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using Google.Protobuf;
using ProtoBuf;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.PMR;
using Tango.PMR.Common;
using Tango.PMR.Integration;

namespace Tango.Transport
{
    public static class ProtoSerializer
    {
        static ProtoSerializer()
        {
            ProtoBuf.Meta.RuntimeTypeModel.Default.AutoAddMissingTypes = true;
            ProtoBuf.Meta.RuntimeTypeModel.Default.AutoAddProtoContractTypesOnly = false;
            ProtoBuf.Meta.RuntimeTypeModel.Default.InferTagFromNameDefault = true;
            ProtoBuf.Meta.RuntimeTypeModel.Default.UseImplicitZeroDefaults = true;
        }

        public static object Deserialize(Type type, byte[] array)
        {
            AutoProtobuf.Build(type);

            using (MemoryStream ms = new MemoryStream(array))
            {
                return Serializer.Deserialize(type, ms);
            }
        }

        public static object DeserializeFromByteString(Type type, ByteString byteString)
        {
            AutoProtobuf.Build(type);

            return Deserialize(type, byteString.ToByteArray());
        }

        //---------------------------------------------------------------------

        public static byte[] Serialize<T>(T message)
        {
            AutoProtobuf.Build<T>();

            using (MemoryStream ms = new MemoryStream())
            {
                Serializer.Serialize<T>(ms, message);
                return ms.ToArray();
            }
        }

        public static T Deserialize<T>(byte[] array)
        {
            AutoProtobuf.Build<T>();

            using (MemoryStream ms = new MemoryStream(array))
            {
                return Serializer.Deserialize<T>(ms);
            }
        }

        public static ByteString SerializeToByteString<T>(T message)
        {
            AutoProtobuf.Build<T>();

            return ByteString.CopyFrom(Serialize<T>(message));
        }

        public static T DeserializeFromByteString<T>(ByteString byteString)
        {
            AutoProtobuf.Build<T>();

            return Deserialize<T>(byteString.ToByteArray());
        }

        public static T ExtractGenericRequestFromContainer<T>(MessageContainer container) where T : class
        {
            var message = MessageFactory.ExtractMessageFromContainer(container);
            var genericType = Type.GetType((message as GenericRequest).Type);
            var innerMessage = ProtoSerializer.DeserializeFromByteString(genericType, (message as GenericRequest).Data);
            return innerMessage as T;
        }
    }
}